This website is helpful because it gives the definition of 45-45-90 triangles. There are also examples and worked out solutions of problems with them. There are also videos that explain 45-45-90 triangles.
This website is helpful because it is interactive. It has a triangle that shows you that no matter how far you extend the triangles sides the angles are still the same. It also explains the Pythagorean Theorem and the area of 45-45-90 triangles as well.
This website is helpful because it shows you how to use the Pythagorean Theorem with 45-45-90 triangles. It also gives information about 30-60-90 triangles. It also gives a table showing the values of different legs of the triangles.
http://www.onlinemathlearning.com/45-45-90-right-triangle.html
This website is helpful because it gives the definition of 45-45-90 triangles. There are also examples and worked out solutions of problems with them. There are also videos that explain 45-45-90 triangles.
http://www.brightstorm.com/math/geometry/pythagorean-theorem/45-45-90-triangles
This website is helpful because it is a video all about 45-45-90 triangles. The video explains the concept of them and is interactive.
http://www.mathopenref.com/triangle454590.html
This website is helpful because it is interactive. It has a triangle that shows you that no matter how far you extend the triangles sides the angles are still the same. It also explains the Pythagorean Theorem and the area of 45-45-90 triangles as well.
http://zonalandeducation.com/mmts/miscellaneousMath/tri454590306090/tri454590306090.htm
This website is helpful because it shows you how to use the Pythagorean Theorem with 45-45-90 triangles. It also gives information about 30-60-90 triangles. It also gives a table showing the values of different legs of the triangles.